I wear a helmet most the time, but not always. I agree it's a great idea to always wear one but on a nice spring day when I want to hit the park in a T-shirt I'll forgo the helmet. It should be up to each person IMO, I very, very rarely hit my head anyway. The times I have I was glad to be wearing a helm though!

Sue me. =)

if the idiocy of this doesn't jump out at you, ill be amazed. when you want to go hit the park (which is inherently more dangerous) youll forego the helmet for what purpose? you cant wear a t shirt with a helmet?
you "rarely hit your head"? all it takes is one time. sarah burke. liam neeson's wife. etc. etc. etc.
yet you admit the times you have hit your head, you were glad you had one on. i hope for your sake you never have to regret NOT wearing one.